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Can anyone give me an idea of what powder bushing to use, to drop 17.0 -17.2 grains of Clay dot, in my 366? Hornady bushing chart doesn't seem to show what bushing to use for clay dot.

Thanks
 

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It's real close to Red Dot by volume, I use the bushing chart RECOMMENDATIONS for Red Dot as a start then check it on a scale.
 

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It's not close to Red Dot. I would say it's more in the neighborhood of a #480, that's where I would start. Here is my thought process on how I came to this conclusion: the Alliant bushing chart gives data for Clay Dot and MEC bushings. A MEC 32 is listed as dropping 17.4 grs. of Clay Dot and 19.2 grs. of Red Dot. Going to the Hornady chart, I see a #480 is supposed to drop 19 grs. of Red Dot and, therefore, should also drop a bit less than 17.4 of Clay Dot. Of course, the bushing charts are merely a starting point and it is very likely you will need a bushing or two above and below the #480 to home in on the charge weight you are looking for.
 

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I'm dropping 19 grs of Reddot with a .462 and 20.5 grs of Am. Select with the same bushing. My 9000 uses a #33 for the same. A #32 gives me a little over 18 of Clay Dot on the 9000 but a I've never loaded it on my 366. I would guess many sizes lower than .462 for 17 of Clay Dot.
 

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I'm dropping 19 grs of Reddot with a .462 and 20.5 grs of Am. Select with the same bushing. My 9000 uses a #33 for the same. A #32 gives me a little over 18 of Clay Dot on the 9000 but a I've never loaded it on my 366. I would guess many sizes lower than .462 for 17 of Clay Dot.
I overlooked it on the Alliant bushing chart, it's there and here it is:

Clay Dot:
Gr. Bushing #
17 468
18 489
19 510

That is some bulky stuff. What are you putting it in? Could cause some stack height issues in some hulls with some wads, particularly the AAHS with a standard wad.
 

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I drop 17.4 of clay dot with a 447 bushing in a spolar. I have the PW Electric Drive on the spolar. In previous lots I have dropped 17.4 with a 444 bushing. I check the drops with digital and beam scale both. Your mileage may vary.
 

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Clay Dot:
Gr. Bushing #
17 468
18 489
19 510

I wouldn't waste my time with these numbers. A .468 was dropping over 21 of American Select.
 

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Clay Dot:
Gr. Bushing #
17 468
18 489
19 510

I wouldn't waste my time with these numbers. A .468 was dropping over 21 of American Select.
I don't know why you would say that. American Select is more dense than both Red Dot and Clay Dot. The Alliant bushing chart says a 468 will drop 21 grs. of American Select. To get 17 grs. of Am. Select, you have to to down to a 423. I don't know what Am. Select has to do with it.
 

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The Alliant chart is off a bit, I drop 19 grains of Clay Dot with a 468 bushing on my Spolar, checked with a digital and balance beam scales
 

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DaJ
Just tried a .450 and it was dropping 17 of ClayDot on the money.

Nebs your .480 was dropping 20 gr of ClayDot. LOL. Love your thought process.

The .462 drops 18.5 of ClayDot. .5 grs less than my 19 gr RedDot drop.
 

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DaJ
Just tried a .450 and it was dropping 17 on the money.

Nebs your .480 was dropping 20 gr. LOL. Love your thought process.

The .462 drops 18.5 of ClayDot. .5 grs less than my 19 gr RedDot drop.
No, I said the 480 would drop 17 grains of Clay Dot, inferring it was the same size as the MEC 32.
 

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Boomhand:

Keep in mind my 480 inference was based on my assumption there was no Hornady bushing chart for that powder and that is where I would start and noted it likely would not be the end point. Once I saw Alliant had data, I pointed to the 468 as the likely place to start. If you didn't have a bushing chart for a particular powder, how would you go about it?
 
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